class Inst:
    DEST_W = 0
    DEST_F = 1
    DEST_NONE = 2
    def __init__(self):
        self.model = None
        self.value = 0
        self.bit = 0
        self.inv_bit = 255 # see Mnemonic.BCF which must be fast
        
        self.dest = Inst.DEST_NONE  
        self.adresse = 0